4 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Order LEPIDOCENTROIDA 
The reasons for uniting the echinothurids with the lepidocentrids in 
a single order, the Lepidocentroida, are given in the Monograph of 
the Echinoidea, vol. 2, pp. 114-121. 
Family ECHINOTHURIDAE 
Subfamily PHORMOSOMINAE 
Genus PHORMOSOMA Wyville Thomson 
PHORMOSOMA BURSARIUM A. Agassiz 
Phormosoma bursarium A. AGAssiz, Challenger Reports, Zoology, vol. 3, pt. 9, 
Echinoidea, p. 99, pl. 10, b, 1881—MorTENSEN, Monograph of the Echinoidea, 
vol. 2, p. 185, pl. 2, fig. 20; pl. 3, figs. 1, 2; pl. 74, figs. 11-15, 1935. 
Phormosoma indicum DGDERLEIN, Wiss. Ergebn. Tiefsee-Exped., vol. 5, Lief. 2, 
p. 180, pl. 15, figs. 1, 2; pl. 38, figs. 2, 3, 1906. 
Localities —Station 5116; Verde Island passage; Sombrero Island 
bearing N. 69° E., 2.5 miles distant (lat. 138°41’00’ N., long. 120° 
47’05’” EK.) ; 866 meters; bottom temperature 10.11° C.; January 20, 
1908. Four specimens. 
Station 5122; east coast of Mindoro; Malabrigo Light bearing 
N. 46° W., 20.6 miles distant (lat. 18°21’30’’ N., long. 120°30’33”’ E.) ; 
402 meters; green mud; February 2, 1908. Several young specimens. 
Station 5123; east coast of Mindoro; Malabrigo Light bearing N. 
44° W., 32.5 miles distant (lat. 13°12’45’’ N., long. 121°38’45’’ 
E.) ; 507 meters; green mud; February 2, 1908. Four specimens. 
Station 5124; east coast of Mindoro; Point Origon (N.) bearing 
S. 56° E., 20.75 miles distant (lat. 12°52’00’’ N., long. 121°48’30’’ 
E.) ; 514 meters; soft green mud; February 2, 1908. Eight specimens. 
Station 5183; between Panay and Negros; Lusaran Light bear- 
ing §. 29° E., 4 miles distant (lat. 10°32’48’” N., long. 122°26’00’’ 
E.); 175 meters; bottom temperature 17.44° C.; soft green mud; 
March 30, 1908. Several specimens. 
Station 5219; between Marinduque and Luzon; Mompog Island 
(NE.) bearing N. 35°30’ W., 12.25 miles distant (lat. 13°21’00’’ 
N., long. 122°18’45’’ E.); 969 meters; bottom temperature 10.44° 
C.; green mud; April 23, 1908. Three specimens. 
Station 5221; between Marinduque and Luzon; San Andreas 
Island (W.) bearing S. 27° E., 5.5 miles distant (lat. 13°38’15’’ 
N., long. 121°48’15’’ E.); 353 meters; bottom temperature 11.33° 
C.; green mud; April 24, 1908. Three specimens. 
Station 5259; off northwestern Panay; Caluya Island (S.) bearing 
S. 73° W., 12 miles distant (lat. 11°57’30’ N., long. 121°42'15’” 
